/*
 * Copyright (c) 2001-2007 Sun Microsystems, Inc.  All rights reserved.
 *  
 *  The Sun Project JXTA(TM) Software License
 *  
 *  Redistribution and use in source and binary forms, with or without 
 *  modification, are permitted provided that the following conditions are met:
 *  
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  
 *  2. Redistributions in binary form must reproduce the above copyright notice, 
 *     this list of conditions and the following disclaimer in the documentation 
 *     and/or other materials provided with the distribution.
 *  
 *  3. The end-user documentation included with the redistribution, if any, must 
 *     include the following acknowledgment: "This product includes software 
 *     developed by Sun Microsystems, Inc. for JXTA(TM) technology." 
 *     Alternately, this acknowledgment may appear in the software itself, if 
 *     and wherever such third-party acknowledgments normally appear.
 *  
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must 
 *     not be used to endorse or promote products derived from this software 
 *     without prior written permission. For written permission, please contact 
 *     Project JXTA at http://www.jxta.org.
 *  
 *  5. Products derived from this software may not be called "JXTA", nor may 
 *     "JXTA" appear in their name, without prior written permission of Sun.
 *  
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 *  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
 *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN 
 *  MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 *  OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 *  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *  
 *  JXTA is a registered trademark of Sun Microsystems, Inc. in the United 
 *  States and other countries.
 *  
 *  Please see the license information page at :
 *  <http://www.jxta.org/project/www/license.html> for instructions on use of 
 *  the license in source files.
 *  
 *  ====================================================================
 *  
 *  This software consists of voluntary contributions made by many individuals 
 *  on behalf of Project JXTA. For more information on Project JXTA, please see 
 *  http://www.jxta.org.
 *  
 *  This license is based on the BSD license adopted by the Apache Foundation. 
 */
package edu.ntu.im.p2ptrade;


import java.io.File;
import java.io.IOException;
import java.security.MessageDigest;
import java.util.Enumeration;

import net.jxta.discovery.DiscoveryEvent;
import net.jxta.discovery.DiscoveryListener;
import net.jxta.discovery.DiscoveryService;
import net.jxta.document.Advertisement;
import net.jxta.exception.PeerGroupException;
import net.jxta.peergroup.PeerGroup;
import net.jxta.pipe.PipeService;
import net.jxta.platform.NetworkManager;
import net.jxta.protocol.DiscoveryResponseMsg;
import net.jxta.protocol.PipeAdvertisement;


/**
 * Illustrates the use of Discovery Service
 * Note this is for illustration purposes and is not meant as a blue-print
 */
public class PipeBroadcaster implements DiscoveryListener, Runnable {

    private transient NetworkManager manager;
    private transient DiscoveryService discovery;
    private PeerGroup netPeerGroup;

    /**
     * Constructor for the DiscoveryServer
     */
    public PipeBroadcaster() {
       /* try {
            manager = new NetworkManager(NetworkManager.ConfigMode.ADHOC, "DiscoveryServer",
                    new File(".cache/server").toURI());
            manager.startNetwork();
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(-1);
        }
        netPeerGroup = manager.getNetPeerGroup();
        */
    	 netPeerGroup = P2PTrade.getInstance().getPeerGroup();
    }

    /**
     * main
     *
     * @param args command line args
     * @throws IOException 
     * @throws PeerGroupException 
     */
    public static void main(String args[]) throws PeerGroupException, IOException {
    	/*P2PTrade trader = new P2PTrade("miao" );
        PipeBroadcaster disocveryServer = new PipeBroadcaster();
        disocveryServer.start();*/
    }
    

    /**
     * create a new pipe adv, publish it for 2 minut network time,
     * sleep for 3 minutes, then repeat
     */
    public void start() {
        long lifetime = 60 * 2 * 100L;
        long expiration = 60 * 2 * 100L;
        long waittime = 60 * 3 * 100L;

        try {
            while (true) {
            	byte[] bid = MessageDigest.getInstance("MD5").digest(
    					"abcd".getBytes("ISO-8859-1"));
                PipeAdvertisement pipeAdv = PipeUtil.getAdv(netPeerGroup,P2PTrade.getInstance().getPipeName(),PipeService.UnicastType, bid);
                System.out.println(pipeAdv.getName());
                discovery = netPeerGroup.getDiscoveryService();	
                // publish the advertisement with a lifetime of 2 mintutes
                discovery.publish(pipeAdv, lifetime, expiration);
                discovery.remotePublish(pipeAdv, expiration);
                try {
                    System.out.println("Sleeping for :" + waittime);
                    Thread.sleep(waittime);
                } catch (Exception e) {// ignored
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * This method is called whenever a discovery response is received, which are
     * either in response to a query we sent, or a remote publish by another node
     *
     * @param ev the discovery event
     */
    public void discoveryEvent(DiscoveryEvent ev) {

        DiscoveryResponseMsg res = ev.getResponse();

        // let's get the responding peer's advertisement
        System.out.println(" [  Got a Discovery Response [" + res.getResponseCount() + " elements]  from peer : " + ev.getSource() + "  ]");

        Advertisement adv;
        Enumeration en = res.getAdvertisements();

        if (en != null) {
            while (en.hasMoreElements()) {
                adv = (Advertisement) en.nextElement();
                System.out.println(adv);
            }
        }
    }



   

	public void run() {
		start();
		
	}
}

